1 <!DOCTYPE html>
2 <html lang="en">
3 <head>
4 <meta charset="UTF-8">
5 <title></title>
6 <script>
7 function select(){
8 var content1=document.getElementById("select");
9 var content2=document.getElementById("input");
10 content2.value=content1.value;
11
12 }
13 </script>
14 </head>
15 <body>
16 <select id="select" onchange="select()">
17 <option value="山东" >山东</option>
18 <option value="河北">河北</option>
19 <option value="重庆">重庆</option>
20 <option value="北京">北京</option>
21 </select>
22 <br>
23 <input type="text" id="input">
24 </body>
25 </html>